ATMEGA164P-20AUR Atmel, ATMEGA164P-20AUR Datasheet - Page 25
![MCU AVR 16KB FLASH 20MHZ 44TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA164P-20AUR
Manufacturer Part Number
ATMEGA164P-20AUR
Description
MCU AVR 16KB FLASH 20MHZ 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA164P-20AUR
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
For Use With
ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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8011O–AVR–07/10
When the write access time has elapsed, the EEPE bit is cleared by hardware. The user soft-
ware can poll this bit and wait for a zero before writing the next byte. When EEPE has been set,
the CPU is halted for two cycles before the next instruction is executed.
• Bit 0 – EERE: EEPROM Read Enable
The EEPROM Read Enable Signal EERE is the read strobe to the EEPROM. When the correct
address is set up in the EEAR Register, the EERE bit must be written to a logic one to trigger the
EEPROM read. The EEPROM read access takes one instruction, and the requested data is
available immediately. When the EEPROM is read, the CPU is halted for four cycles before the
next instruction is executed.
The user should poll the EEPE bit before starting the read operation. If a write operation is in
progress, it is neither possible to read the EEPROM, nor to change the EEAR Register.
The calibrated Oscillator is used to time the EEPROM accesses.
typical programming time for EEPROM access from the CPU.
Table 5-2.
Symbol
EEPROM write
(from CPU)
EEPROM Programming Time
Number of Calibrated RC Oscillator Cycles
26,368
ATmega164P/324P/644P
Table 5-2 on page 25
Typ Programming Time
3.3 ms
lists the
25
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